Cancer, cells, DNA damage as a result of uncontrolled or abnormal cell growth and proliferation in a way. A day in our body (DNA) mutations in nearly 10,000, although the immune system scans our body every millisecond and destroys cancer cells.
Cancer, the uncontrolled üreyerek body's cells to invade neighboring tissues (invasion) or more away from the source of the organ, blood or lymph through the spread (metastasis) is a disease caused by. During DNA replication in cells because of the deterioration değiştitirler structure. Normal body cells and tissues, while maintaining the original size and structure, aggressive cancer cells, draw a table.
The most important feature of cancer cells with the potential to "oncogenes" that contain the potential for deterioration of the tissue is completely different to be a new cell. This completes the transformation of cancer cells, is almost impossible to identify the origin of these cells in the pathology specimens.
When a cancer cell, the body's immune system recognizes these foreign cells and parts. In this way, thousands of cancer cells in the body, is destroyed by the immune system. Each cell, suppress the activation of oncogenes antionkogenler (Tumor Suppressor Gene) are available. In the event of loss or inactivation of oncogene activity Antionkogenlerin is permitted. It follows that the formation of cancer.
Mutated cells, but a very small part of the body lead to cancer. There are several reasons for this:
1. Showing the ability of living cells and normal cells is less than that of mutation. So they die.
2. To prevent excessive growth of cells still showing the mutation, even in many of the normal control mechanism geridönüm ("tumor suppressor genes") is located. So very few of mutant cells survived the cell becomes cancerous.
3. Often, cancer has the potential to grow these cells are destroyed by cancer before creating the body's immune system.
This event is described as follows:
Most of the mutant cells, because of altered genes among themselves, form an abnormal protein. The construction of this abnormal antibody proteins or by stimulating the body's immune system against cancer cells gained sensitivity of lymphocytes cause destruction of the cell allow the cancer. (A fact that supports this event because of the organ trasnplantasyonu five-fold increase in cancer risk in patients receiving immunosuppressive therapy.
Impair the effectiveness of the immune system of cancer cases predisposing factors (predisposition) is known as. Uncontrolled, these cells are not destroyed by the immune system to occupy üreyerek their texture. Only it is not limited tissue or spread to adjacent tissue (invasion). Irrelevant parts of the body via blood and lymph circulation in the portables (metastasis).
Cancer is the beginning of the most important feature in the mass surrounding tissue complex, is attached. Benign (benign) tumors usually demarcated mass. However, malignant (malignant) tumors, although the boundaries are found tightly attached to the uncertain and the surrounding tissues. The first stage is usually ağrısızdırlar.
Cancer, according to the tissue of origin that is formed is called.
Cancer cells; civarlarındaki Lara reaches tissue, blood circulation, lymph system or spread to other parts of the body by means of body cavities and surfaces. This is called metastasis.
Our body as uncontrolled growth of cancer called malignant tumors. Cancers are divided into two parts as good-natured and bad-tempered. Malignant tumors spread to organs and other tissues (metastasis) show feature.
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